This is an optical fiber splitter spool support for PBS splitters. It is based on the TN1550R5A2 splitter from Thorlabs and similar models. The pocket on the upper part is made to fit the sleeve. The elongated holes above and below the ‘PBS’ text are to fix the support on an optical table with M6 screws. I've added the STEP and f3d files for anyone who wants to modify the project. I have 50:50, 90:10, 99:1, and PBS splitters versions. Check them out!

As for the printing, I printed the support using plain PLA. There is no need for any kind of support.

Enjoy.